[Minor] Add umask routine

diff --git a/src/lua/lua_util.c b/src/lua/lua_util.c
index f81b901c1e2185546541992fd48d8a34613bf29f..29c24f0a0596f7e1febc0b0c035abaf553ed72f4 100644 (file)
--- a/src/lua/lua_util.c
+++ b/src/lua/lua_util.c
@@ -403,6 +403,14 @@ LUA_FUNCTION_DEF (util, file_exists);
  */
 LUA_FUNCTION_DEF (util, mkdir);
 
+/***
+ * @function util.umask(mask)
+ * Sets new umask. Accepts either numeric octal string, e.g. '022' or a plain
+ * number, e.g. 0x12 (since Lua does not support octal integrals)
+ * @return {number} old umask
+ */
+LUA_FUNCTION_DEF (util, umask);
+
 
 /***
  * @function util.pack(fmt, ...)
@@ -550,6 +558,7 @@ static const struct luaL_reg utillib_f[] = {
        LUA_INTERFACE_DEF (util, readpassphrase),
        LUA_INTERFACE_DEF (util, file_exists),
        LUA_INTERFACE_DEF (util, mkdir),
+       LUA_INTERFACE_DEF (util, umask),
        LUA_INTERFACE_DEF (util, get_hostname),
        LUA_INTERFACE_DEF (util, pack),
        LUA_INTERFACE_DEF (util, unpack),
@@ -2212,6 +2221,38 @@ lua_util_mkdir (lua_State *L)
        return 1;
 }
 
+
+static gint
+lua_util_umask (lua_State *L)
+{
+       mode_t mask = 0, old;
+
+       if (lua_type (L, 1) == LUA_TSTRING) {
+               const gchar *str = lua_tostring (L, 1);
+
+               if (str[0] == '0') {
+                       /* e.g. '022' */
+                       mask = strtol (str, NULL, 8);
+               }
+               else {
+                       /* XXX: implement modestring parsing at some point */
+                       return luaL_error (L, "invalid arguments");
+               }
+       }
+       else if (lua_type (L, 1) == LUA_TNUMBER) {
+               mask = lua_tonumber (L, 1);
+       }
+       else {
+               return luaL_error (L, "invalid arguments");
+       }
+
+       old = umask (mask);
+
+       lua_pushnumber (L, old);
+
+       return 1;
+}
+
 /* Backport from Lua 5.3 */
 
 /******************************************************************************